Index: gnome-shell/src/meson.build
--- gnome-shell/src/meson.build.orig
+++ gnome-shell/src/meson.build
@@ -66,7 +66,7 @@ foreach src: theme_sources
     command: [
       'bash', '-xec',
       ';'.join([
-        'output="$1/$(realpath --relative-to="'+ meson.current_source_dir() + '" $0)"',
+        'output="$1/$(grealpath --relative-to="'+ meson.current_source_dir() + '" $0)"',
         'mkdir -p "$(dirname "$output")"',
         # Can't use proper regex ("s,\(\b\)url\(\s*(\),\1yaru-url-handler\2,g") as per
         # https://github.com/mesonbuild/meson/issues/1564
